Many people have said this British series would hold us over until "Downton Abbey" returns in January (if you need to catch up, go to pbs.org). For those who are caught up, tonight is the season finale of the series that looks at life in 1950s East London by following a young nurse as she works as a midwife, with a cast that features Jessica Raine, Jenny Agutter, Miranda Hart and Judy Parfitt. 8 p.m. Sunday on KCTS (seattletimes.com/tvlistings).